cast iron headers - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 11-26-2007, 09:49 PM
Registered User
 
Last photo:
Join Date: May 2006
Location: Kamloops B.C.
Posts: 231
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
cast iron headers

My gen v 454 exhaust manifolds have lumps cast on the top inside of the header. Another set of big block manifolds have the same type of material but they are drilled (for air injection?) but these ones are out of a truck and are not drilled and tapped. My question is whether I should grind them out for better flow.
Clint

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 11-26-2007, 10:53 PM
curtis73's Avatar
Hates: Liver. Loves: Diesel
 
Last wiki edit: How to find cheap parts
Last journal entry: 1999-2001: Getting it on the road
Last photo:
Join Date: Dec 2005
Location: Pittsburgh, PA
Age: 40
Posts: 5,128
Wiki Edits: 16

Thanks: 0
Thanked 2 Times in 2 Posts
You can, but it won't do much good. For the cost of a good set of headers you can gain way more good flow. Manifolds are bare minimum flow. The best you can do with stock manifolds is port them, but the work involved for the minimal increase in power isn't worth it.

If they're off and you have some abrasives, go for it, but don't expect more than 2 hp or so. For the work involved and the cost of abrasives, you'll never feel a difference. Save up for headers.
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
1955 cast iron powerglide slingslingbinks Transmission - Rearend 8 09-11-2008 08:53 PM
Cast Iron Heads El Co 406 Engine 4 08-29-2007 08:50 PM
welding cast iron 53LEDSLED General Rodding Tech 40 11-03-2005 12:39 PM
Cast Iron Crankshaft RPM Limit ? bigjoedo Engine 6 11-24-2002 03:49 PM
allum. vs. cast iron heads in a daily driver? solowookie Engine 4 02-06-2002 05:26 PM


All times are GMT -6. The time now is 10:44 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.